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Preparation method of novel mixed iron powder chemical analysis sample

A mixed iron, a new type of technology, applied in the field of analysis, can solve the problems of suppliers' delivery concerns, large quality disputes, poor representativeness of test results, and large fluctuations in test results, so as to reduce the incidence of quality disputes, run well, and parallelize good sex effect

Active Publication Date: 2016-05-11
PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of mixed iron powder contains part of metallic iron and has poor grindability. At present, no corresponding sample preparation method standard has been established. When referring to GB / T10322.1 iron ore sampling and sample preparation method for this type of mixed iron powder When preparing chemical analysis samples, since there are no specific regulations on grinding times, grinding time, and burning methods, the part that is difficult to grind and sieve through grinding accounts for more than 30%. When using this analysis sample to detect elements such as TFe, the detection The results fluctuated greatly, with a standard deviation of 2.02%. The representativeness of the test results was poor, which led to the supplier's concerns about delivery and quality objections.
Grinding times and grinding time affect the particle size composition of the sample, and at the same time cause the sample itself to oxidize and deteriorate, and high temperature burning will also affect the detection accuracy

Method used

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  • Preparation method of novel mixed iron powder chemical analysis sample

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preparation example Construction

[0016] A kind of preparation method of novel mixed iron powder chemical analysis sample of the present invention comprises the following steps:

[0017] a. Take the sample to be tested and pulverize it to obtain a sample with a particle size of <3 mm, grind it, and pass through a sieve of 80 mesh to 120 mesh;

[0018] b. Take the sample sieved in step a, heat it from 21°C to 25°C to 980°C to 1020°C, keep it in the air for 0.8 to 1.2 hours, stop heating, take it out, dry and cool to room temperature;

[0019] In order to allow enough air to enter the furnace for pre-oxidation reaction with the sample during the heating process, and to volatilize and circulate the gas in the furnace, leave a gap of about 15mm in the furnace door during the heating process; close it after the temperature reaches 1000 °C Furnace door, that is, the function of insulating air and heat preservation is to volatilize and remove carbon dioxide, combined water and a small amount of fluorine, chlorine and...

Embodiment 1

[0036] (1) Sampling and dividing: After taking samples according to the iron ore sampling standard, take a few samples to clean the crusher (model: XPZΦ200X125), sealed crusher (model: JJ-98), splitter, 3mm round hole Sieve, 80-mesh analysis sample sieve and other tools and equipment, after cleaning, all the samples are broken to less than 3mm. On a dry and clean operating table, use a divider to mix and shrink about 80g of the sample, which is used to prepare the analysis sample.

[0037](2) Grinding of the analysis sample: put 80g of the sample to be prepared into the sealed pulverizer (model: JJ-98) and grind for 180s, and put all the samples after grinding into the 80-mesh analysis sample and use a manual sieve The samples in the material bowl should be completely brushed; put the sieve material into the material bowl again for grinding for 90 seconds, and put all the samples after grinding into the 80-mesh analysis sample and use the manual sieving method to sieve The sa...

Embodiment 2

[0040] (1) Sampling and dividing: After taking samples according to the iron ore sampling standard, take a few samples to clean the crusher (model: XPZΦ200X125), sealed crusher (model: JJ-98), splitter, 3mm round hole Sieve, 100-mesh analysis sample sieve and other tools and equipment, after cleaning, all the samples are broken to less than 3mm. On a dry and clean operating table, use a divider to mix and shrink about 80g of the sample, which is used to prepare the analysis sample.

[0041] (2) Grinding of the analysis sample: put 80g of the sample to be prepared into the sealed pulverizer (model: JJ-98) and grind for 180s, and put all the samples after grinding into the 100-mesh analysis sample and use a manual sieve The samples in the material bowl should all be brushed clean; put the sieve material into the material bowl again for grinding for 90 seconds, and put all the samples after grinding into the 100-mesh analysis sample and use the manual sieving method to sieve The...

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Abstract

The invention belongs to the technical field of analysis, and particularly relates to a preparation method of a novel mixed iron powder chemical analysis sample. The method disclosed by the invention comprises the following steps of: a, taking a to-be-tested analysis sample, smashing to obtain the sample with a particle size smaller than 3mm, grinding, and sieving by a sieve with a specification of 80 to 120 meshes; b, taking the to-be-tested analysis sample sieved in the step a, heating to a temperature of 980 to 1,020 DEG C, carrying out air insulation and carrying out heat preservation for 0.8 to 1.2h, then stopping heating taking out the sample, and cooling to the room temperature; c, weighing the cooled sample, and until the weight of the sample is constant, carrying out chemical analysis on the sample. According to the method disclosed by the invention, influence of grinding times, grinding time and a firing mode on analysis of the particle size of the sample, quality and detection is effectively avoided; a sample preparation error is reduced; the sample preparation method of the novel mixed iron powder is normalized; a quality objection occurrence rate is greatly reduced; the method is excellent in operation; the professional and standard preparation method is provided for chemical analysis pretreatment of the mixed iron powder.

Description

technical field [0001] The invention belongs to the technical field of analysis, and in particular relates to a method for preparing a novel mixed iron powder chemical analysis sample. Background technique [0002] Mixed iron powder uses steel slag and iron slag as the main raw material, and is equipped with a small amount of other iron powder ore. Through the ball mill washing process, a new type of mixed ore raw material is produced. It is mainly used as the raw material for sintered ore for blast furnace smelting. Due to For trade settlement needs, sampling inspection of this type of mixed iron powder is required. This type of mixed iron powder contains part of metallic iron and has poor grindability. At present, no corresponding sample preparation method standard has been established. When referring to GB / T10322.1 iron ore sampling and sample preparation method for this type of mixed iron powder When preparing chemical analysis samples, since there are no specific regul...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 刘光奎陈霖刘文彬陈德
Owner PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
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